Hot-air furnace



W. ABIGT.

HOT AIR FURNACEI APPLICATION FILED 056.27.192I.

154315078., Patented Oct. 3, 1922.

2 SHEETS- SHEET l.

MQ/j Z IIIIII/II 'Illlmu- W. ABIGT.

I HoT AIR FuRNAc'E.

APPL|CAT|ON FILED DEC- 2711921.

4315,078, Patented 00t.3,1922.

2 SHEETS-SHEET 2.

' atented @et 3, ltdfl.

if u time o EGT-.AIB FURNACE.

.application nled December 27, 1921. Serial No. 525,108.

To all 'whom et' may concern.'

Be it known that l, l/Vinnm'ir Amer, a citizen of the United States,residing at Eva-ns# ville, in the county of Vanderburgh and State ofIndiana, have invented certain new and useful Improvements in flot-AirFurnaces, of which the following is a specification.

rllhis invention relates to hot air` furnaces of the class embodying anupper drum or radiator fed by a plurality of inlets from the combustionchamber.

My improvements'insure a uniform draft on the fire, eliminate tendencyyof the draft to 'draw only at the back of the radiator, and effectbetter heating of the radiator so that a more nearly maximum radiationis obtained therefrom, and the prevention of down or baclr draft andpuffing of smoke and gases out through the door of the fire bowl whenthe door is opened or while fresh fuel is being thrown into the firebowl.

A practical embodiment of my invention such as has been found to be ofcommercial utility, is hereinafter described and dis closed in theaccompanying drawings but l wish it understood that the principlesinvolved may becarried out in other embodiments than that specificallydescribed and illustrated. |llhe disclosure, therefore, is not to beconsidered in limitation of the scope of the invention.

In the accompanying` drawingsr Figure l is a side elevation partly insection.

Fig. tion. y

llig. 3 is a plan view of the radiator.k l Fig. i is a bottom viewthereof.

Fig. 5 is a plan view of the lower section of the combustion chamber,dotted lines representing the air feeding means; and

llig. 6 isan enlarged plan view of the duplex air inlet, a part of theair feeding ring being shown in section. y

lily improvements are shown in connection'with a substantially completehot air furnace for the purpose of disclosing their relationshipthereto, but it is to be understood that those 4parts ofthe furnacewhich are not directly related to the improvements need not necessarilybe used.

The ash pit section appears at l; the `hre bowl or pot is shown atLZ. y

2 is a front elevation partly in sec- Surmountingthe fire bowl or pot isthe lower section 3 of the combustion chamber, to the lower part ofwhich section my improved air feeding devices are attached. f'he uppersection l of the combustion chamber is suitably connected to the lowersection 3 thereof, section 4 having its edge tting into a channel 3a insection 3.

f T he upper section l supports the radiator or heat drum, the latterbeing composed. of a lower section 5 and an upper section 6, section 5having channels 5a to reecive the edges of the section 6. The parts 7are for connection to the flue leading to the chimney. y

rlhe sections 5 and 6 comprise a hollow annular radiator` into which theheat, gases, and other products of combustion pass en route tothe smokeflue, thereby causing the radiator to radiate the heat yfor heatingpurposes.

4 A defect common to the radiators of hot air furnaces as heretoforeconstructed has been that the draftfrom the combustion chamber hastended to go directly to the rear of the radiator so that the radiatorhas not been adaquately heated, this 'being `due to the location of theoutlets or to takeoffs throughwhich theheat passes from the combustionchamber to the radiator. Furi thermore, the take-ofi" commonly used inthis general type of hot air furnacey has failed yto prevent gases andsmoke from puffing out of combustion in the radiator nor for preventingthe down draft which` results in the udine heretofore examined. l havetherefore, provided an improved nipple,

duct, or take-off arrangement whose object is to substantially equallydistribute the draft into the radiator so that a maximum heating eectwill be obtained;` and, further, down draft, with resulting puffing willbe obviated.

`With the foregoing object in view there is provided the take-offs,nipples, or pipes 8 and 9 projecting downwardly from the lower section 5of the radiator' on opposite sides thereof, and the nipple, duct, ortaire-off 16 projecting downwardly from the section 5 at the frontthereof, said. nipples or takeoifs being tightly received in openings11, 12, 13, respectively, provided in the top of the upper section 4 ofthe combustion chamber. To further insure as nearly equal distributionas possible, the lower and upper sections 5 and 6 of the radiator areprovided with inwardly projecting hollow parts or sections 14 and 15,respectively, which are braced at 16. The section. 14 is provided with adownwardly extending nipple ortalzeoif 16 whch is'disposed substantiallyat the center of the radiator and lits tightly in an opening; 17 in theupper section 4 of the combustion chamber. A support or lug 18 which iscast integral with the section 5, rests upon the top of the section 4 toassist in supporting the radiator.

It will be observed that no direct connection is provided between theeXtreme rearl parts 14, 15, 16, thedraft above the centerof the lire istaken off in such manner that it is compelled to heat this additionalpart of the radiator before splitting to pass in oppositey directionsaround and through the radiator. The four outlets for the draft whichare provided by the take-offs or nipples 8, 9, 10 and 16 and the absenceof a take-off for the rear of the radiator, insures an even distributionof the heat, gases, and products of combustion in the radiator and theimparting to the latter of a relatively large percentage of the heatunits carried thereby. Additional to this, the draft taken olf in thismanner, insures -a regular and even consumption of the fuel so that theefficiency of the latter is increased. The provision of the take-off 10at the front of the radiator insures the creation of a draft verticallyin front of thedoor to the fire lbowland combustion chamber, which draftis supplemented by reason of the other takeoffs, and this draft throughthe take-off 10 prevents pumng hereinbefore described.

Secured to the under side of the forwardly projecting part 3b of thelower section of the combustion chamber is a duplex air inlet 19 whichis a casting provided with suitable ears 2O by which it is bolted as at21 to said part 3b. A suitable door 22 is used to cover the mouth of theduct 19 so that any desired control of the air may be had.4

The section 3 is provided with an arcshaped seat V23. v

The ends 24 of the duplex air inlet 19 pass through openings in thesection 3 and project beneath the seat 23 as shown at 24a, saidprojecting` parte being offset.

A hollow air feeding or blast ring 26 is provided which has a flange 27constructed and shaped to fit the seat 23, said ring having` openings 28in its side which receive the projecting ends 24 ofthe duplex air inlet19 whereby air entering through said inlet has access to the interior ofthe hollow ring' 26.

The ring 26 is of a dimension and shape adapting it to fit into thetapered lowerend of the section 3 which. supports it, the rotation ofsaid ring,T being prevented by the fiange 27 and seat 23, said partsalso assisting in the support of the ring. The ringr is provided withair discharge slots 29 which are preferably placed spaced at regularintervals on the interior thereof exceptthat the continuity of theseslots is broken adjacent the ends of the flange 27. Suppl@ mental slots30 are, however, provided at that portion of the ring between theopening-s 28. The slots 29 are located on the under, or rounded face ofthe ring so that they will discharge the air in numerous jets or spraysdown onto the fuel in the lire bowl but will be so disposed that theycannot receive fuel thrown into the fire bowl. In brief, these slots arearranged so that they cannot become clogged.

rlhe air, in any desired quantity, may be drawn into the blast ring` 26,accordingJr to the extent to which the door 22 is open. The chimneydraft on the heater is all that is necessary to draw in Van adequatesupply of air (when door 22 is open) for delivery uniformly over thefire when it reaches the slots 29. As the air inlet 19, but moreparticularly the ring- 26, is heated, the air is preheated before it isdischarged onto the fire. Combustion may thus be increased, particularlywhen fresh fuel is introduced. The manner in which the ring 26 issupported, enables it to be removed without difliculty whenever desired.

I claim:

1. In a hot air furnace, the combination with the combustion chamber, ofan endless radiator located. thereabove, and take-offs or `outletsconnecting the sides and Vfront of the radiator with the sides and frontof the oombustion chamber, the rear part of the radiator having notake-off connection with the combustion chamber.

2. In a hotair furnace, the combination with the combustion chamber, ofan endless radiator having a hollow part projecting inwardly thereoffrom the front of the radiator, a. take-off or outlet connecting thefront of the radiator with the front of the combustion chamber, otheroutlets connecting the sides of the radiator with the sides of thecombustion chamber` and an outlet conmeeting the combustion chamber withthe inwai-(illy projecting part, the rear part of the radiator having notake-oft' connection with the combustion chamber.

3. ln aJ hot air furnace, the combination with the combustion chamber,of an annular radiator having a hollow part projecting radially thereoffrom the front of the melia tor to the center thereof, a take-oli" oroutlet connecting the front of the radiator with the front of thecombustion chamber, other 10 outlets connecting the sides of theradiator with the sides of the combustion chamber, and an outletconnecting the radially projecting part with the combustion chamber,

the rear part of the radiator having no takel5 off connection with thecombustion chamber. In testimony whereof l aHiX In signature.

WILLIA ABGT.

